Underscores is a starter framework designed for developers who want to create custom themes efficiently. It serves as a clean, minimal base that can be modified and extended, avoiding the bloat of pre-built themes. This tool is ideal for those with coding experience who prefer to build from scratch rather than using parent themes.

• Lean, modern templates: Offers just-right HTML5 templates with clear comments, reducing clutter and making customization straightforward.
• Organized starter CSS: Includes smartly structured CSS in style.css to help kickstart design work without unnecessary defaults.
• Custom template tags: Provides functions in template-tags.php to keep templates clean and prevent code duplication across files.
• Responsive navigation: Features a script at js/navigation.js that enables toggled dropdown menus on small screens, ready for styling.
• Sample layouts and tools: Comes with optional samples like a 404 template, custom header implementation, and two CSS layouts for sidebars, aiding in common theming tasks.